Beginning PL/SQL question

I'm writing a pl/sql program to insert the month number and number of days in that month into a table called Month_Days. I only want to use the Insert Into command once, and I also don't want to use a nested If statement. i can get the month number into month column using a loop and a counter going up to 13, but i don't know how to get the number of days into the days column. I'm assuming Jan has 31 days, Feb has 29, March has 31, Apr has 30, etc.
Here's what i have so far:

Create Table Month_Days(
Month Number(2)
Days Number(2));

Declare
LoopX Binary_Integer;
Begin
LoopX:=0;
Loop
LoopX:=LoopX+1;
If LoopX=13 Then
Exit;
End If;
Insert Into Month_Days Values (LoopX);
End Loop;
End;

Thanks in advance for any help!Hello,

the easiest way to get the lastnumber of a months is:

cDate VARCHAR2(20);
cLastDay VARCHAR2(2);

-- Build date
cDate := TO_CHAR(loopx) || '01' || '2003'

SELECT TO_CHAR(LAST_DAY(TO_DATE(cDate, 'MMDDYYYY')), 'DD')
INTO cLastDay FROM dual;

Hope that helps ?

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